Try the map in the first comment.

Otherwise, The Black Keep is across the Bridge of the Betrayer in E11. Climb ALL the stairs to the top, run into the alcove and down the stairs to the wall. Hit the button and be transported inside. You will have to do a good bit of exploring to get the Ancient Key to open the door an play with the boss. Watch for traps. There are many hidden doors that open with a button.

The Wine Cellar is behind the bar in Sepermeru. That’s a last do kind of place.

Warmaker’s is in B8. Run into the alcove, press the button, and be prepared to have fun. Skip the Arena Champion if you are a first timer. Seriously, run past that chick and don’t stop. She’s past the second locked door all alone in the middle of the big room.

FUN FACT - To complete the Dungeon Delver Journey, you only have to kill the end boss.